El Pacto Del Mayflower /

Defines screws, explains their functions, and suggests simple experiments to demonstrate how they work.

This inspiring biographical series ties in with elementary history, science, and social studies curricula, providing teachers with a valuable interdisciplinary resource. With these books, young readers will discover historical figures who devoted their lives to making the world a better place, and changed the course of history. Text copyright 2004 Lectorum Publications, Inc.

Defines pulleys, explains their functions, and suggests simple experiments to demonstrate how they work.

Introduces different kinds of light, the properties of light, and how light can create shadows of different shapes and sizes.

[English]Why do maple and oak trees drop their leaves in the fall? What other animals share the forest with chipmunks, deer, and snakes? Hike through this book, and find out what makes temperate deciduous forests one of Earth's treasures. [Spanish]¿Por qué al arce y al roble se les caen las hojas en el otoño? ¿Qué otros animales comparten el bosque con las ardillas listadas, los venados y las serpientes? Da un paseo por este libro. Descubrirás por qué los bosques templados son uno de los grandes tesoros de la Tierra.

In the winter of 1856, a storm delays the lighthouse keeper's return to an island off the coast of Maine, and his daughter Abbie must keep the lights burning by herself.

Todo el mundo ama a los pandas. Nos encanta verlos jugar, trepar, dormir y masticar. ¡Pero cuidado, también rasguñan—mira ese árbol! Ilustrado con maravillosas imágenes que registran el lugar único de este animal en China y en todo el mundo, este libro en español es para niños de Nivel 2 que leen solos o con ayuda de vez en cuando.